Martin p



(No Model.)

M. P. ZIMMERMAN.

PUMP.

Patented 001. 18,1881.

uw T NITE STATES PATENT OFFICE.

PUMP.

SPECIFICATION forming' part of Letters Patent No. 248,381, dated October 18, 1881.

Application filed May 6, 1881. (No model.)

To all whom it may concer/1t:

Be it known that I, MARTIN P. ZIMMER- MAN, a citizen of the United States, residing at Canton, in the county of Stark' and State of Ohio, have invented certain new and useful Improvements in Pumps; and I do hereby declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or ligures ot' reference marked thereon, which form a part of this specification.

Figuie l is a vertical section of a pump embodying my improvements. Fig. 2 shows the construction ot' the crank-shaft, and Fig. 3 shows another style ot' shaft.

ln the drawings, A represents the body of the pump. It is formed with a single continuous chamber, B, extending from the top to the bottom.

O represents the lower part of the pump, and it may be made in one or more sections, as depth or other circumstances may require.

Between the body and the part G are placed a working-barrel, D, and a two-way-valve part, E. The working-barrel is formed separately from the body A and from the other parts, and is provided with two cylindrical pumpingtubes, d d, each carrying a piston. The upper end of the barrel is provided with a recess at c, wherein the upper part, A, is seated, and by means of which a tightjoint between the barrel and the body is attainable. The two-way part E is at the lower end attached to the section C by means of a central lower tube, E. There are two separate tubes, e e, at the upper end of this part communicating with the central lower tube, E. The separate tubes e e coincide with the tubes d d ofthe barrel D, and

. when the parts are joined together the lower tubes are fitted tightly within the upper ones.

m m are the valves, mounted on the top ot' the tubes e e, respectively.

Bymakingthe barrel separate from the body Aand from the lower parts the operative parts of the pump can be cleaned and repaired much more readily than when the barrel or barrels are formed within, or integral with, the body;

as near as possible to the center of the pump. To allow for such a connection the crank-shaft is bent to have a long transverse arm, o, at right angles to the shaft, and the cranks p p are arranged adjacent to this arm. When thus arranged in a pump having a cylindrical bore the cranks can be made with a much longer radius than when parallel bars or arms q q at some distance apart are used, as shown in Fig. 3. Moreover. this arrangement requires fewer bends in the crank shaft, and thus avoids the weakening incident to such bending. The rods O O'are situated entirely within the body A, and I thus avoid the expensive features rendered necessary in those pumps having the delivery tube situated between the piston-rods.

By casting the seat or recess c on the barrel part D, I obviate the necessity of using bolts for fastening the parts together, said recess providing a sufficiently tight joint.

What I claim is- The combination of the following elements, namely: the pump-body A, having the single central continuous chamber, B, the piston-rods O O, situated entirely within said central chamber, the pumping part D, formed separate from the other parts, with the recess at c, and with two parallel barrels, d d, the tube-section C, and the intermediate part, E, having the diverging tubes e e joined to the barrels d d by tting into their lower ends, as set forth.

In testimony whereof I aftix my signature in presence ot' two witnesses.

' MARTIN P. ZIMMERMAN.

Witnesses:

J. P. FAweaTT, A. C. HUIER. 

